Avoiding dendrite formation by confining lithium deposition underneath Li–Sn coatings
| Autor: | Danielle M. Butts, Da Li, Ziyang Wei, Bruce Dunn, Qizhang Yan, Philippe Sautet, Grace Whang, Jian Luo |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Mechanical Engineering Intermetallic chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Focused ion beam Dendrite (crystal) Coating Chemical engineering chemistry Mechanics of Materials Transmission electron microscopy 0103 physical sciences engineering General Materials Science Lithium 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Materials Research. 36:797-811 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/s43578-020-00047-8 |
| Popis: | The use of interfacial layers to stabilize the lithium surface is a popular research direction for improving the morphology of deposited lithium and suppressing lithium dendrite formation. This work considers a different approach to controlling dendrite formation where lithium is plated underneath an interfacial coating. In the present research, a Li–Sn intermetallic was chosen as a model system due to its lithium-rich intermetallic phases and high Li diffusivity. These coatings also exhibit a significantly higher Li exchange current than bare Li thus leading to better charge transfer kinetics. The exchange current is instrumental in determining whether lithium deposition occurs above or below the Li–Sn coating. High-resolution transmission electron microscopy and cryogenic focused ion beam scanning electron microscopy were used to identify the features associated with Li deposition. Atomic scale simulations provide insight as to the adsorption energies determining the deposition of lithium below the Li–Sn coating. |
| Databáze: | OpenAIRE |
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